CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P1589

DTC Code DTC Name
P1589 Acceleration Sensor Learning Value

DESCRIPTION

The ECM stores DTC P1589 if the ECM or other components that require the yaw rate and acceleration sensor (airbag sensor assembly)*1 or deceleration sensor*2 to be calibrated (deceleration sensor zero point calibration) are replaced and calibration is terminated or the vehicle is driven before calibration is complete.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1589 Acceleration Sensor Learning Value

Condition 1:

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. The vehicle speed is 2 km/h (1.2 mph) or more.

  2. Deceleration sensor zero point calibration has not been completed.

  3. -

  4. 1 trip detection logic

Condition 2:

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. Deceleration sensor zero point calibration is performed.

  2. The learned values of the deceleration sensor zero point calibration are abnormal (out of normal range).

  3. -

  4. 1 trip detection logic

Condition 1:


  • Deceleration sensor zero point calibration has not been performed

Condition 2:


  • Vehicle was not stabilized during the deceleration sensor zero point calibration

  • Yaw rate and acceleration sensor (Airbag sensor assembly)*1

  • Deceleration sensor*2

  • ECM

 - DTC stored

*1: w/ VSC

*2: w/o VSC

CAUTION / NOTICE / HINT

Note


  • Perform initialization when parts related to the continuously variable transaxle are replaced.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

PROCEDURE


  1. PERFORM INITIALIZATION (DECELERATION SENSOR ZERO POINT CALIBRATION)

    Note


    • If the CVT oil pressure calibration is performed before the deceleration sensor zero point calibration, DTC P1589 is stored. In this case, perform the steps below to return the system to normal.

    • Always perform zero point calibration with the vehicle on level ground (Inclination: 0 +/-0.25°).

    • Do not shake or vibrate the vehicle during zero point calibration.


    1. Turn the ignition switch off.

    2. Move the shift lever to P and apply the parking brake.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

      Note

      Do not start the engine.

    5. Enter the following menus: Powertrain / Engine and ECT / Utility / Reset Memory.


      Powertrain > Engine and ECT > Utility
      Tester Display
      Reset Memory

    6. Enter the following menus: Powertrain / Engine and ECT / Utility / Deceleration Sensor Zero Point Calibration.


      Powertrain > Engine and ECT > Utility
      Tester Display
      Deceleration Sensor Zero Point Calibration

      Tech Tips


      • When "Complete" is displayed on the screen, the deceleration sensor zero point calibration is completed.

      • If "Error" is displayed on the screen and DTC P1589 is output (confirm the DTC detection conditions), the yaw rate and acceleration sensor (airbag sensor assembly)*1 or deceleration sensor*2 circuit may have a malfunction.

      • Shaking or vibrating the vehicle during zero point calibration may cancel calibration. If "Error" is displayed on the screen and DTC P1589 is not output, perform calibration again.


        • *1: w/ VSC

        • *2: w/o VSC

      Result
      Result Proceed to
      Deceleration sensor zero point calibration is completed normally A
      DTC P1589 is output (w/ VSC) B
      DTC P1589 is output (w/o VSC) C

    B

    CHECK YAW RATE AND ACCELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) Click here

    C

    CHECK DECELERATION SENSOR Click here

    A

  2. PERFORM INITIALIZATION (CVT OIL PRESSURE CALIBRATION)

    Note

    Do not initialize the learned values by performing reset memory.


    1. Turn the ignition switch off and wait at least 30 seconds.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and wait at least 2 seconds.

      Note

      Do not start the engine.

      Tech Tips

      CVT oil pressure calibration is performed with the ignition switch ON (engine stopped). However, the calibration cannot be performed under the following conditions:


      • Oil pressure sensor value is 0.065 MPa (0.663 kgf/cm2, 9.43 psi) or higher.

      • CVT oil temperature is -5°C (23°F) or less or 100°C (212°F) or higher.

    4. Turn the GTS on.

    5. Start the engine and wait at least 5 seconds.

      Note


      • Start the engine with the shift lever in P.

      • After starting the engine, do not operate the accelerator pedal.

    6. Enter the following menus: Powertrain / Engine and ECT / Utility / CVT Oil Pressure Calibration.


      Powertrain > Engine and ECT > Utility
      Tester Display
      CVT Oil Pressure Calibration

      Tech Tips


      • During CVT oil pressure calibration, the engine idle speed will increase.

      • When "Complete" is displayed on the screen, the CVT oil pressure calibration is completed.

      • The learned values cannot be cleared by only disconnecting and reconnecting the cable to the negative (-) battery terminal.

    7. Check that no DTC is stored.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END

  3. CHECK YAW RATE AND ACCELERATION SENSOR (AIRBAG SENSOR ASSEMBLY)


    1. Check the yaw rate and acceleration sensor (airbag sensor assembly) for any inclination, bracket deformation or installation clearance.

      OK
      The yaw rate and acceleration sensor (airbag sensor assembly) is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY INSTALL OR REPLACE YAW RATE AND ACCELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) Click here

    OK

  4. READ VALUE USING GTS (G SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List.


      Powertrain > Engine and ECT > Data List
      Tester Display
      G Sensor

      Powertrain > Engine and ECT > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      G Sensor Converted output voltage of deceleration sensor

      min.: 0 V

      max.: 79.998 V

      Displays converted voltage of deceleration sensor


      • Vehicle on level ground: 2.31 V to 2.69 V

      • Decelerating: 1.88 V to 2.5 V

      • Accelerating: 2.5 V to 3.11 V

      • G sensor malfunction: Set to 1.87 V

      • Communication malfunction: Set to 1.87 V

      		 -

    5. In accordance with the display on the GTS, read the Data List.

      Result
      Proceed to
      Data displayed is as specified under Normal Condition
      Data displayed is not as specified under Normal Condition

    Data displayed is not as specified under Normal Condition

    REPLACE YAW RATE AND ACCELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) Click here

    Data displayed is as specified under Normal Condition

  5. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here

  6. REPLACE YAW RATE AND ACCELERATION SENSOR (AIRBAG SENSOR ASSEMBLY)


    1. Replace the yaw rate and acceleration sensor (airbag sensor assembly).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here

  7. CHECK DECELERATION SENSOR


    1. Check the deceleration sensor for any inclination, bracket deformation or installation clearance.

      OK
      The deceleration sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY INSTALL OR REPLACE DECELERATION SENSOR Click here

    OK

  8. READ VALUE USING GTS (G SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List.


      Powertrain > Engine and ECT > Data List
      Tester Display
      G Sensor

      Powertrain > Engine and ECT > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      G Sensor Converted output voltage of deceleration sensor

      min.: 0 V

      max.: 79.998 V

      Displays converted voltage of deceleration sensor


      • Vehicle on level ground: 2.31 V to 2.69 V

      • Decelerating: 1.88 V to 2.5 V

      • Accelerating: 2.5 V to 3.11 V

      • G sensor malfunction: Set to 1.87 V

      • Communication malfunction: Set to 1.87 V

      		 -

    5. In accordance with the display on the GTS, read the Data List.

      Result
      Proceed to
      Data displayed is as specified under Normal Condition
      Data displayed is not as specified under Normal Condition

    Data displayed is as specified under Normal Condition

    GO TO STEP 5 Click here

    Data displayed is not as specified under Normal Condition

  9. REPLACE DECELERATION SENSOR


    1. Replace the deceleration sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here